CN114908668A - Temporary prestressed fixing device for lap joint of suspension beam and debugging method - Google Patents
Temporary prestressed fixing device for lap joint of suspension beam and debugging method Download PDFInfo
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- CN114908668A CN114908668A CN202110983371.6A CN202110983371A CN114908668A CN 114908668 A CN114908668 A CN 114908668A CN 202110983371 A CN202110983371 A CN 202110983371A CN 114908668 A CN114908668 A CN 114908668A
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- 239000000725 suspension Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 91
- 239000010959 steel Substances 0.000 claims abstract description 91
- 210000001503 joint Anatomy 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 21
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
Abstract
The application relates to a temporary prestressed fixing device and a debugging method for lapping suspension beams, which comprises a box body structure, wherein the box body structure comprises a frame body and at least three sub-box bodies which are positioned in the frame body and are arranged at intervals, the side wall of each sub-box body is fixedly connected to the inner wall of the frame body, a steel bar with threads is at least arranged on each sub-box body in a penetrating manner along the vertical direction, the steel bar is positioned at one end of each sub-box body, the upper end of the steel bar is in threaded connection with an upper nut, the lower end of the steel bar is in threaded connection with a lower steel cushion block, and the lower end of the steel bar is in threaded connection with a lower nut; the sub-box body and the lower steel cushion block are used for clamping the U-shaped beam. By adopting the technical scheme, the steel bar of the device is inserted into one end of the U-shaped beam, then the box structure is aligned to the steel bar and the hoisting ring and is placed at one end of the U-shaped beam, and the box structure is fixed on the U-shaped beam. Finally, prestress is applied to the steel bar through a jack, and the engagement force of the box body structure and the U-shaped beam is enhanced, so that the settlement of the cross-center beam caused by deflection deformation is reduced, and the butt joint precision is improved to the maximum extent.
Description
Technical Field
The application relates to the field of suspension beam construction, in particular to a suspension beam lapped prestress temporary fixing device and a debugging method.
Background
In the design of a large-span bridge, the structural form of a suspension beam is partially selected, and in the construction of the suspension beam, a proper suspension beam lapping device must be selected firstly to ensure the deflection deformation of the control bridge and the butt joint precision of the whole bridge.
At present, Bailey truss lapping devices are mostly adopted for lapping suspension beams, and although the Bailey truss structure is convenient to construct and good in stability, the Bailey truss lapping devices are not beneficial to the butting precision of subsequent beams.
Disclosure of Invention
In order to improve the accuracy of the butt joint between the beams,
in a first aspect, the application provides a temporary prestressed fixing device for a suspension beam, which adopts the following technical scheme:
a suspension beam lapped prestress temporary fixing device comprises a box body structure, wherein the box body structure comprises a frame body and at least three sub-box bodies which are arranged in the frame body at intervals, the side walls of the sub-box bodies are fixedly connected to the inner wall of the frame body, a steel bar with threads penetrates through each sub-box body at least along the vertical direction, the steel bar is located at one end of each sub-box body, the upper end of the steel bar is in threaded connection with an upper nut, the lower end of the steel bar is in threaded connection with a lower rigid cushion block, and the lower end of the steel bar is in threaded connection with a lower nut; and the sub-box body and the lower rigid cushion block are used for clamping the U-shaped beam.
Through adopting above-mentioned technical scheme, insert the one end of U type roof beam with the rod iron of this device, then aim at the rod iron and play rings with the box structure, place in the one end of U type roof beam, fix the box structure on U type roof beam through the rod iron, last just cushion, last nut, just cushion and lower nut down, form the interim fixing device of accessible bolt regulation. Finally, prestress is applied to the steel bar through a jack, and the engagement force of the box body structure and the U-shaped beam is enhanced, so that the settlement of the cross-center beam caused by deflection deformation is reduced, and the butt joint precision is improved to the maximum extent.
When the box body structure of the temporary fixing device is installed, the U-shaped beam hoisting ring penetrates through a gap between the sub-box bodies so as to be convenient to hoist. When the wet joints are poured, the gaps between the sub-box bodies are used as concrete pouring channels, the concrete is poured into the wet joints connected with the U-shaped beams, and the subsequent concrete vibration is completed through the gaps between the sub-box bodies. Thereby facilitating the pouring of the wet joint.
Optionally, a reinforcing plate is arranged above the frame body along the direction perpendicular to the sub-box body, the reinforcing plate is fixedly connected to the frame body and the sub-box body, and a plurality of reinforcing plates are arranged along the length direction of the sub-box body.
Through adopting above-mentioned technical scheme to increase the bulk rigidity and stability, the bulk rigidity satisfies the requirement when guaranteeing U type roof beam overlap joint.
Optionally, be equipped with two channel-section steels that are the symmetry and set up in the subbox, two channel-section steels all are located the subbox and fixed connection in the subbox, and two channel-section steels are back of the body setting on the back.
Through adopting above-mentioned technical scheme, improved the holistic structural strength of subbox.
Optionally, the two channel-section steels are arranged at intervals to form a through cavity for the steel bar to pass through.
Through adopting above-mentioned technical scheme, wear to establish the chamber and can make things convenient for the rod iron to wholly run through to make interim fixing device's box structure fix on U type roof beam.
Optionally, the channel-section steel inner chamber is equipped with the stiffening rib, and stiffening rib both ends are fixed connection respectively in the relative both sides lateral wall of channel-section steel.
Through adopting above-mentioned technical scheme, in order to increase the global rigidity of interim fixing device box structure, but do not influence overall structure's dead weight and atress rationality, select to set up stiffening rib in that the channel-section steel is inside.
Optionally, two reinforcing ribs are arranged at intervals at one end, close to the steel bar, of the channel steel, and one reinforcing rib is arranged at one end, far away from the steel bar, of the sub-box body.
Through adopting above-mentioned technical scheme, the welded twice stiffening rib of channel-section steel rear portion not only helps undertaking the weight of whole U type roof beam, helps undertaking the prestressing force of rod iron between box structure and the U type roof beam moreover, increases the overall stability of box, and the channel-section steel front end welds the weight that the stiffening rib also helps undertaking whole U type roof beam together, keeps whole rigidity and stability.
Optionally, a base plate is rotatably connected to one side of the frame body, when the frame body does not need to be heightened, the base plate is located on one side of the frame body, the lower end face of the base plate is flush with the lower end face of the frame body, and when the height of the frame body needs to be heightened, the base plate rotates to the lower portion of the frame body relative to the frame body and abuts against the lower end face of the frame body.
Through adopting above-mentioned technical scheme, when needs bed hedgehopping, can rotate the backing plate to framework below. This setting is when not needing the bed hedgehopping, and the backing plate can regard as the overlap joint supporter, shares stress, makes the more stable overlap joint of box structure on the cantilever beam, when not needing the bed hedgehopping, can regard as the bed hedgehopping thing to use convenient operation.
Optionally, be equipped with a plurality of and increase the board on the backing plate, it installs on the backing plate through coupling assembling to increase the board, coupling assembling includes connecting screw, increase all set up threaded hole on board and the backing plate, connecting screw threaded connection is in all threaded holes, the force application groove of the application of force of being convenient for is seted up to the connecting screw upper end.
By adopting the technical scheme, the thickness of the heightening plate connected with the base plate can be controlled by screwing the connecting screw rod, so that the height of the whole cushion of the frame body can be adjusted, and the device is suitable for various working conditions.
Optionally, the lateral wall of the frame body provided with the base plate is provided with a sliding groove in the vertical direction, one end of the heightening plate is provided with a sliding block, and the sliding block is located in the sliding groove and is connected to the sliding groove in a sliding manner.
Through adopting above-mentioned technical scheme, the spout has a spacing to the slider to make heightening the board can be more stable with backing plate spacing link together. .
In a second aspect, the application provides a method for debugging overlap joint of a suspension beam, which adopts the following technical scheme:
a method for debugging the lap joint of a suspension beam by using a prestressed temporary fixing device comprises the following steps,
firstly, oppositely placing lifting rings of a U-shaped beam into a gap between two sub-box bodies, then penetrating steel bars into the gap along a preformed hole in the sub-box bodies and a preformed hole in the end of the U-shaped beam to form a whole, and finally fixing the whole box body structure on the end of the U-shaped beam by using an upper nut, an upper steel cushion block, a lower nut and a lower steel cushion block.
Step two: before the prestress tensioning, the settlement value of the whole prestress temporary fixing device needs to be calculated and used as the basis for applying the prestress value subsequently.
Step three: after the box body structure is fixed on the U-shaped beam, the steel bar is stretched through a jack, and a reverse prestress capable of balancing a sedimentation value is applied;
step four: after the U-shaped beam is lifted, the U-shaped beam is aligned and lifted, slowly placed into a midspan position, and one end of the box body structure is lapped on the cantilever beam.
Step five: for the placed U-shaped beam, elevation adjustment can be carried out by a method of padding a base plate under the temporary prestress fixing device, and the butt joint precision is ensured in the adjustment process so as to facilitate the smooth butt joint of the subsequent prestress pipelines.
By adopting the technical scheme, the U-shaped beam and the cantilever beam are lapped by the prestress temporary fixing device, so that the butting elevation and the butting precision can be conveniently adjusted. And through applying prestressing force, can effectively reduce the settlement value of overlap joint department, further guarantee the precision of butt joint.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the temporary fixing device is adopted for overlapping the suspension beams, so that the device is simple, the rigidity and the stability are high, the requirements on the butt joint accuracy and the butt joint safety and stability are guaranteed;
2. by applying prestress to the temporary fixing device, not only can the settlement value at the lap joint of the suspension beam be effectively reduced and the biting force between the temporary fixing device and the U-shaped beam be improved, but also the butting precision of the elevation can be improved and the beam body is ensured not to generate large settlement displacement;
3. by adopting the temporary fixing device, not only the steel consumption is small, the economy and the saving are realized, but also enough space gaps are reserved between every two sub-boxes, and the subsequent concrete pouring and vibrating construction can be facilitated.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a schematic view of the embodiment 1 in connection with a U-shaped beam.
FIG. 3 is a sectional view of embodiment 1.
Fig. 4 is an enlarged view at a in fig. 2.
Fig. 5 is an enlarged view at B in fig. 2.
FIG. 6 is a schematic view of the structure of embodiment 3.
FIG. 7 is a cross-sectional view of example 3 when not elevated.
FIG. 8 is a schematic view of the screw joint in example 3.
FIG. 9 is a sectional view of the embodiment 3 at the time of raising.
Description of the reference numerals: 1. a box structure; 2. a screw connection structure; 3. a frame body; 4. a sub-box body; 5. a reinforcing plate; 6. channel steel; 7. reinforcing ribs; 8. a steel bar; 9. screwing a nut; 10. a steel-raising cushion block; 11. a lower steel cushion block; 12. a lower nut; 13. a first through hole; 14. a second through hole; 15. a U-shaped beam; 16. lifting a lifting ring; 17. a base plate; 18. a slider; 19. heightening a plate; 20. a chute; 21. accommodating grooves; 22. rotating the lifting lug; 23. connecting a screw rod; 24. a force application groove; 25. a threaded bore.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Example 1
The embodiment 1 of the application discloses a temporary prestressed fixing device for lapping suspension beams. Referring to fig. 1 and 2, a temporary prestressed fixing device for a lap joint of suspension beams includes a box structure 1 and a bolt structure 2.
The box structure 1 is fixed on the U-shaped beam 15 through the bolt connection structure 2, and a temporary fixing device which can be adjusted through bolts is formed. Prestress is applied to the screw connection structure 2 through a jack, the engagement force between the box body structure 1 and the U-shaped beam 15 is enhanced, so that the settlement of the middle-span beam caused by deflection deformation is reduced, and the butt joint precision is improved to the maximum extent.
Specifically, referring to fig. 1, the box structure 1 includes a frame 3 and three sub-boxes 4 located in the frame 3. One sub-case 4 corresponds to one screw structure 2. The three sub-boxes 4 are all arranged in parallel, and every two of the three sub-boxes 4 are arranged at intervals. The side wall of the sub-box 4 is fixedly connected to the inner wall of the frame 3 by welding. A reinforcing plate 5 is arranged above the frame 3 along the direction vertical to the sub-box body 4. The reinforcing plate 5 is fixedly connected to the frame 3 and the sub-tank 4 by welding. Two reinforcing plates 5 are arranged along the length direction of the sub-box body 4.
In order to improve box structure 1's structural strength, refer to fig. 2 and fig. 3, be equipped with two channel-section steels 6 that are the symmetry and set up in subbox 4, two channel-section steels 6 all are located subbox 4 and fixed connection in subbox 4, and two channel-section steels 6 are back of the body and set up mutually. Two channel-section steel 6 is the interval setting and forms and wears to establish the chamber. The inner cavity of the channel steel 6 is provided with a reinforcing rib 7, and the reinforcing rib 7 is fixedly connected to the inner side walls of three sides of the channel steel 6. Two reinforcing ribs 7 are arranged at the end, close to the steel bar 8, of the channel steel 6 at intervals, and one reinforcing rib 7 is arranged at the end, far away from the steel bar 8, of the channel steel 6.
Referring to fig. 2, the screw connection structure 2 includes a steel bar 8, an upper nut 9, an upper steel pad 10, a lower steel pad 11, and a lower nut 12. The sub-box body 4 is provided with a reserved hole for the steel bar 8 to pass through. Referring to fig. 4 and 5, a first through hole 13 with an upper end flaring is opened on the upper steel cushion block 10. And a second through hole 14 with the lower end in flaring arrangement is formed in the lower steel cushion block 11. The first through hole 13 and the second through hole 14 are used for the steel bar 8 to pass through. Referring to fig. 2, the steel bar 8 is a threaded bar and may be a threaded steel bar. The upper nut 9 and the lower nut 12 are respectively in threaded connection with the upper end of the steel bar 8 and the lower end of the steel bar 8.
During installation, the steel bar 8 penetrates through the sub-box body 4 and the U-shaped beam 15, then the upper end of the steel bar 8 penetrates through the upper steel cushion block 10, the upper end of the steel bar 8 is screwed with the nut 9, and the upper nut 9 is abutted against the inner wall of the first through hole 13. And then the lower end of the steel bar 8 penetrates through the lower steel cushion block 11, and the lower nut 12 is screwed at the lower end of the steel bar 8, so that the lower nut 12 is tightly propped against the inner wall of the second through hole 14. At this time, the U-shaped beam 15 is abutted against the box structure 1 by the lower rigid cushion block 11, and the box structure 1 is abutted against the upper rigid cushion block 10.
In use, referring to fig. 2, the steel bar 8 of the device is inserted into one end of the U-shaped beam 15, then the box structure 1 is aligned with the steel bar 8 and the lifting ring 16 and placed at one end of the U-shaped beam 15, and the box structure 1 is fixed on the U-shaped beam 15 through the screw connection structure 2. The position of the U-beam 15 relative to the steel bar 8 is adjusted by screwing the upper and lower nuts 9, 12. Finally, prestress is applied to the steel bar 8 through a jack, and the engagement force of the box body structure 1 and the U-shaped beam 15 is enhanced, so that the settlement of the span-middle beam caused by deflection deformation is reduced, and the butt joint precision is improved to the maximum extent.
When the box structure 1 of the temporary fixing device is installed, the lifting rings 16 of the U-shaped beam 15 are passed through the gaps between the sub-boxes 4 to facilitate lifting. When the wet joint pouring is carried out, the concrete is poured into the wet joint connected with the U-shaped beam 15 by taking the gap between the sub-boxes 4 as a concrete pouring channel, and the subsequent concrete vibration is completed through the gap between the sub-boxes 4. Thereby facilitating the pouring of the wet joint.
Example 2
firstly, the hoisting rings 16 of the U-shaped beam 15 are oppositely placed in a gap between the two sub-box bodies 4, then the steel bars 8 penetrate along the preformed holes in the sub-box bodies 4 and the preformed holes at the end of the U-shaped beam 15 to be connected into a whole, and finally the whole box body structure 1 is fixed at the end of the U-shaped beam 15 through the screw connection structure 2.
Step two: before the prestress tensioning, the settlement value of the whole prestress temporary fixing device needs to be calculated and used as the basis for applying the prestress value subsequently.
Step three: after the box body structure 1 is fixed on the U-shaped beam 15, the steel bar 8 is stretched through the jack, the upper steel cushion block and the upper screw cap 9, and a reverse prestress capable of balancing a sedimentation value is applied;
step four: after the U-shaped beam 15 is lifted, the U-shaped beam is aligned and lifted, and slowly placed in a midspan position, and one end of the box body structure 1 is lapped on the cantilever beam.
Step five: the height of the placed U-shaped beam 15 can be adjusted by a method of placing a base plate 17 under the box body structure 1, and the butt joint precision is ensured in the adjusting process so as to facilitate the smooth butt joint of the subsequent prestressed pipelines.
Example 3
The difference between embodiment 3 and embodiment 1 is that, referring to fig. 6 and 7, a base plate 17 is rotatably connected to one side of the frame body 3 for facilitating the height adjustment of the box structure 1. An accommodating groove 21 is formed in the lower end face of the frame body 3, and the accommodating groove 21 is communicated with one side wall of the frame body 3. The lower end face of the sub-box 4 is also provided with an accommodating groove 21, and the accommodating groove 21 of the frame body 3 is in butt joint communication with the accommodating groove 21 of the sub-box 4. The side wall of the frame body 3 is provided with a chute 20 along the vertical direction, and the chute 20 is communicated with an accommodating groove 21. Rotating lifting lugs 22 are fixedly mounted on two sides of one end of the base plate 17, and the two rotating lifting lugs 22 are respectively rotatably connected to two sides of one end, close to the sliding chute 20, of the accommodating groove 21. Thereby pivotally connecting the backing plate 17 to the frame 3.
Referring to fig. 6 and 7, the backing plate 17 is provided with a plurality of heightening plates 19, and the heightening plates 19 are mounted on the backing plate 17 through a connecting assembly. One end of the heightening plate 19 is provided with a slide block 18, and the slide block 18 is positioned in the slide groove 20 and is connected with the slide groove 20 in a sliding manner. Referring to fig. 8, the connecting assembly includes a connecting screw 23, threaded holes are formed in the heightening plate 19 and the backing plate 17, and the connecting screw 23 is in threaded connection with all the threaded holes. The upper end of the connecting screw 23 is provided with a force application groove 24 for applying force conveniently, and the force application groove 24 is a hexagonal groove. The connecting screw rods 23 are at least two and are uniformly distributed on the backing plate 17.
In the initial state, the pad 17 is located on the frame 3 side and the lower end surface is flush with the lower end surface of the frame 3. The base plate 17 can then be used as a support element to enable the box structure 1 to be more stably attached to the cantilever beam. When the height of the box body structure 1 needs to be adjusted, the connecting screw rods 23 are firstly screwed, and a proper number of heightening plates 19 are selected and connected with the backing plate 17 through the connecting screw rods 23. Then the backing plate 17 is rotated relative to the box structure 1, so that the backing plate 17 is rotated into the accommodating groove 21, and the heightening plate 19 connected with the backing plate 17 is positioned below the backing plate 17 and horizontally arranged, thereby completing the height adjustment of the box structure 1. And the rest heightening plates 19 slide to the position between the two rotating lugs 22 along the sliding grooves 20, and the lower end surfaces of the rest heightening plates 19 at the lowest position are flush with the lower end surfaces of the heightening plates 19 connected with the backing plates 17. The box body structure 1 can be more stably lapped on the cantilever beam. Fig. 9 is a view in which all the heightening plates 19 are used.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a suspension beam lapped prestressing force temporary fixing device which characterized in that: the box structure comprises a box body structure (1), wherein the box body structure (1) comprises a frame body (3) and at least three sub-box bodies (4) which are arranged in the frame body (3) at intervals, the side walls of the sub-box bodies (4) are fixedly connected to the inner wall of the frame body (3), a steel bar (8) with threads is arranged on each sub-box body (4) at least in a penetrating mode in the vertical direction, the steel bar (8) is arranged at one end of each sub-box body (4), the upper end of each steel bar (8) is in threaded connection with an upper nut (9), the lower end of each steel bar (8) is in threaded connection with a lower rigid cushion block (11), and the lower end of each steel bar (8) is in threaded connection with a lower nut (12); the sub-box body (4) and the lower steel cushion block (11) are used for clamping the U-shaped beam (15).
2. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 1, wherein: the improved refrigerator is characterized in that a reinforcing plate (5) is arranged above the frame body (3) along the direction perpendicular to the sub-box body (4), the reinforcing plate (5) is fixedly connected to the frame body (3) and the sub-box body (4), and a plurality of blocks are arranged on the reinforcing plate (5) along the length direction of the sub-box body (4).
3. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 2, wherein: be equipped with two channel-section steels (6) that are the symmetry and set up in subbox (4), two channel-section steels (6) all are located subbox (4) and fixed connection in subbox (4), and two channel-section steels (6) are mutually on the back and set up.
4. A suspension beam lap joint prestressed temporary fixing device according to claim 3, characterized in that: two channel-section steel (6) are the interval setting and form the cavity of establishing that wears that supplies rod iron (8) to pass.
5. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 4, wherein: the inner cavity of the channel steel (6) is provided with a reinforcing rib (7), and two ends of the reinforcing rib (7) are respectively and fixedly connected to the side walls on two opposite sides of the channel steel (6).
6. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 5, wherein: two reinforcing ribs (7) are arranged at one end, close to the steel bar (8), of the channel steel (6) at intervals, and one reinforcing rib (7) is arranged at one end, far away from the steel bar (8), of the sub-box body (4).
7. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 1, wherein: frame (3) one side is rotated and is connected with backing plate (17), and when need not heighten frame (3), backing plate (17) are located frame (3) one side and terminal surface and the terminal surface parallel and level under frame (3), when needs heighten when frame (3) is high, backing plate (17) rotate to frame (3) below and butt under frame (3) terminal surface relatively frame (3).
8. The suspension beam lap joint prestressed temporary setting device according to claim 7, characterized in that: be equipped with a plurality of pieces on backing plate (17) and increase board (19), it installs on backing plate (17) through coupling assembling to increase board (19), coupling assembling includes connecting screw (23), increase all set up threaded hole (25) on board (19) and backing plate (17), connecting screw (23) threaded connection is in all screw holes (25), force application groove (24) of the application of force of being convenient for are seted up to connecting screw (23) upper end.
9. The overlap prestressed temporary fixing device of suspension beam as claimed in claim 8, wherein: sliding groove (20) have been seted up along vertical direction to the lateral wall that backing plate (17) were installed in framework (3), it is equipped with slider (18) to increase board (19) one end, slider (18) are located sliding groove (20) and sliding connection in sliding groove (20).
10. A debugging method for lapping of a suspension beam is characterized in that: use of the prestressed temporary fixing device according to any one of claims 1 to 6, comprising the steps of,
firstly, relatively placing lifting rings (16) of a U-shaped beam (15) into a gap between two sub-box bodies (4), then penetrating steel bars (8) into the gap along preformed holes in the sub-box bodies (4) and preformed holes in the end of the U-shaped beam (15) to form a whole, and finally fixing the whole box body structure (1) at the end of the U-shaped beam (15) by using lower nuts (12) and lower steel cushion blocks (11);
step two: before the prestress tensioning, the settlement value of the whole prestress temporary fixing device needs to be calculated and used as the basis for applying the prestress value subsequently;
step three: after the box body structure (1) is fixed on a U-shaped beam (15), a steel bar (8) is stretched through a jack, an upper steel cushion block (10) and an upper screw cap (9), and a reverse prestress capable of balancing a settlement value is applied;
step four: after the U-shaped beam (15) is lifted, aligning and hoisting are carried out, the U-shaped beam is slowly placed in a midspan position, and one end of the box body structure (1) is lapped on the cantilever beam;
step five: the height of the placed U-shaped beam (15) can be adjusted by a method of padding a base plate (17) under the temporary prestressed fixing device, and the butt joint precision is ensured in the adjusting process so as to facilitate the smooth butt joint of the subsequent prestressed pipelines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110983371.6A CN114908668A (en) | 2021-08-25 | 2021-08-25 | Temporary prestressed fixing device for lap joint of suspension beam and debugging method |
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| CN202110983371.6A CN114908668A (en) | 2021-08-25 | 2021-08-25 | Temporary prestressed fixing device for lap joint of suspension beam and debugging method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015307A (en) * | 2012-12-13 | 2013-04-03 | 江苏省交通科学研究院股份有限公司 | Prestressed concrete pontoon |
| CN104532745A (en) * | 2014-12-11 | 2015-04-22 | 中建六局土木工程有限公司 | Mounting method for unbounded pre-stress steel bars of large-span variable cross-section pre-stressed girder type bridge |
| CN105862572A (en) * | 2016-06-01 | 2016-08-17 | 中交路桥华南工程有限公司 | Super-long vertical unbonded prestress structure and assembling method thereof |
| CN110924287A (en) * | 2019-09-24 | 2020-03-27 | 中铁二局第三工程有限公司 | Semi-fabricated large-span combined box girder and construction method thereof |
| CN111206492A (en) * | 2020-03-02 | 2020-05-29 | 上海市城市建设设计研究总院（集团）有限公司 | Transverse segmented prefabricated prestressed concrete bent cap structure and assembling method |
| CN111827123A (en) * | 2020-07-27 | 2020-10-27 | 田育民 | Bridge cantilever quick positioning device |
| KR102227878B1 (en) * | 2020-11-16 | 2021-03-15 | (주) 효성 | Construction Method of Long Span Bridge Using PSC Girder |
| CN113265953A (en) * | 2021-06-15 | 2021-08-17 | 浙江交工集团股份有限公司 | Prefabricated segmental bent cap |
-
2021
- 2021-08-25 CN CN202110983371.6A patent/CN114908668A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015307A (en) * | 2012-12-13 | 2013-04-03 | 江苏省交通科学研究院股份有限公司 | Prestressed concrete pontoon |
| CN104532745A (en) * | 2014-12-11 | 2015-04-22 | 中建六局土木工程有限公司 | Mounting method for unbounded pre-stress steel bars of large-span variable cross-section pre-stressed girder type bridge |
| CN105862572A (en) * | 2016-06-01 | 2016-08-17 | 中交路桥华南工程有限公司 | Super-long vertical unbonded prestress structure and assembling method thereof |
| CN110924287A (en) * | 2019-09-24 | 2020-03-27 | 中铁二局第三工程有限公司 | Semi-fabricated large-span combined box girder and construction method thereof |
| CN111206492A (en) * | 2020-03-02 | 2020-05-29 | 上海市城市建设设计研究总院（集团）有限公司 | Transverse segmented prefabricated prestressed concrete bent cap structure and assembling method |
| CN111827123A (en) * | 2020-07-27 | 2020-10-27 | 田育民 | Bridge cantilever quick positioning device |
| KR102227878B1 (en) * | 2020-11-16 | 2021-03-15 | (주) 효성 | Construction Method of Long Span Bridge Using PSC Girder |
| CN113265953A (en) * | 2021-06-15 | 2021-08-17 | 浙江交工集团股份有限公司 | Prefabricated segmental bent cap |
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